Try another version of this question Expand the expression:
Get help: Box 1: Enter your answer as an expression. Example: 3x^2+1, x/5, (a+b)/c
`(2x-1)^7` =
Be sure your variables match those in the question `128x^(7)-448x^(6)+672x^(5)-560x^(4)+280x^(3)-84x^(2)+14x-1`